Nimbus JOSE+JWT up to 4.38 HMAC Padding cryptographic issue

Summaryinfo

A vulnerability classified as critical has been found in Nimbus JOSE+JWT up to 4.38. This issue affects some unknown processing of the component HMAC Handler. Performing a manipulation results in cryptographic issue (Padding). This vulnerability is known as CVE-2017-12973. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Nimbus JOSE+JWT up to 4.38. This affects some unknown processing of the component HMAC Handler. The manipulation with an unknown input leads to a cryptographic issue vulnerability (Padding). CWE is classifying the issue as CWE-310. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Nimbus JOSE+JWT before 4.39 proceeds improperly after detection of an invalid HMAC in authenticated AES-CBC decryption, which allows attackers to conduct a padding oracle attack.

The bug was discovered 04/13/2017. The weakness was published 08/20/2017 (Website). It is possible to read the advisory at bitbucket.org. This vulnerability is uniquely identified as CVE-2017-12973 since 08/20/2017. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1600 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 129 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 4.39 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2022-0770). Similar entries are available at VDB-105616 and VDB-105614. Be aware that VulDB is the high quality source for vulnerability data.

Affected

• IBM DB2
• Red Hat Enterprise Linux
• IBM SPSS
• EMC Avamar
• Hitachi Ops Center

Productinfo

Vendor

• Nimbus

Name

• JOSE+JWT

Version

• 4.0
• 4.1
• 4.2
• 4.3
• 4.4
• 4.5
• 4.6
• 4.7
• 4.8
• 4.9
• 4.10
• 4.11
• 4.12
• 4.13
• 4.14
• 4.15
• 4.16
• 4.17
• 4.18
• 4.19
• 4.20
• 4.21
• 4.22
• 4.23
• 4.24
• 4.25
• 4.26
• 4.27
• 4.28
• 4.29
• 4.30
• 4.31
• 4.32
• 4.33
• 4.34
• 4.35
• 4.36
• 4.37
• 4.38

CPE 2.3info

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CPE 2.2info

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Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

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